Bricks, Masonry, Asphalt and Concrete - driling into cement... Re-rod???
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michael10725
09-29-09, 03:06 PM
What do I do to get through this pourch step... May Be 8 inches thick... New cement dit stoped 1 inch into driling and now bit is dull... Should I try driling with a steel bit to get through what seems to be re-rod... Or get a new dril bit and dril a new hole an inch to the side of the first hole???:wall: This lil smiley face kinda fits whare i am at LoL
Gunguy45
09-29-09, 03:57 PM
Were you using a hammer drill with a carbide tip? Did you run a bit of water in while drilling to keep the bit cool?
If you hit rebar you should see the shininess at the bottom of the hole after blowing out the dust. I wouldn't try to drill through it..move your holes if needed.
If you hit rebar you should see the shininess at the bottom of the hole after blowing out the dust. I wouldn't try to drill through it..move your holes if needed.
ray2047
09-29-09, 04:17 PM
You need to rent at least a ¾" commercial hammer drill (AKA rotary impact drill).. They will provide the correct drill bits for you. Br prepared to pay at least $20 per bit and use two or three. You should always start with a smaller diameter bit and work your way up.
If you hit an obstruction you may need to start
over.
Always use two hands on a ¾" commercial hammer drill. They can easily break your wrist if they hang up,
Just a side note you are drilling concrete not cement and you need drill bits for concrete not masonry.
You could use star a drill and I have seen my father do it but I would never even try. They are a pre-electric tool used to drill holes in concrete, You turned them in your hand as you hit them with a 3 or 4 pound hammer.
Star Drill:
http://img14.imageshack.us/img14/469/pneumaticstardrillbitti.gif
If you hit an obstruction you may need to start
over.
Always use two hands on a ¾" commercial hammer drill. They can easily break your wrist if they hang up,
Just a side note you are drilling concrete not cement and you need drill bits for concrete not masonry.
You could use star a drill and I have seen my father do it but I would never even try. They are a pre-electric tool used to drill holes in concrete, You turned them in your hand as you hit them with a 3 or 4 pound hammer.
Star Drill:
http://img14.imageshack.us/img14/469/pneumaticstardrillbitti.gif
GreenJelly
10-06-09, 12:21 PM
Most impact drills cost slightly more then the non-impact drills. There are cordless and non-cordless options for slightly over $50. These drills are great, and I would probably pay the additional $10 for the impact option. The Drills generally have a switch to change from impact to non-impact, so they can be used as regular drills too. As far as I know, there is no Lithium based impact drills at this time, so if you go this route you will have to use the less powerfull drills.
Never the less, these drills also come with an additional handle on the drill that can be removed. Rigid makes a great drill, however most contractors will buy the Dewault or other higher grade products. I have never had a problem with the Rigid tools but I do not use them for extended periods of time. With that said, many people would rather by a higher quality tool because there is nothing worse then having to stop half way through a Job because of a broken tool.
You do not have to use a impact drill for very small jobs, but you will spend a significant more time drilling holes, more drill bits and allot more effort. I do not own a impact drill and I get exhausted drilling after two or three holes into the relatively soft cinder blocks.
Rental seems like a very expensive option for the DIY'er.
Never the less, these drills also come with an additional handle on the drill that can be removed. Rigid makes a great drill, however most contractors will buy the Dewault or other higher grade products. I have never had a problem with the Rigid tools but I do not use them for extended periods of time. With that said, many people would rather by a higher quality tool because there is nothing worse then having to stop half way through a Job because of a broken tool.
You do not have to use a impact drill for very small jobs, but you will spend a significant more time drilling holes, more drill bits and allot more effort. I do not own a impact drill and I get exhausted drilling after two or three holes into the relatively soft cinder blocks.
Rental seems like a very expensive option for the DIY'er.